*{
    box-sizing: border-box;
    padding :0 ;
    margin: 0;
}
*::before,*::after{box-sizing: border-box;}
.skin{
    position: relative;
    background: #ffe600;
    height: 100vh; /* 高度100vh即占满全屏 */
}

.delta{
    border: 10px solid black;
    border-color: black transparent green transparent;
    border-bottom: none;
    width: 0px;
    height: 0px;
    position: relative;
    left: 50%;
    top: 145px;
    margin-left: -10px;
    z-index: 2;
}
@keyframes wave{
    0%{transform: rotate(0deg);}
    33%{transform: rotate(5deg);}
    66%{transform: rotate(-5deg);}
    100%{transform: rotate(0deg);}
}
.delta:hover{
    transform-origin: center bottom;  /* 水平以中间为基准，垂直以底部为基准 */
    animation: wave 300ms infinite linear;
}
.arc{
    width: 20px;
    height: 8px;
    position: absolute;
    top: -18px;
    left: -10px;
    border-radius: 10px 10px 0px 0px;
    background: black;
}
.eye{
    border: 4px solid black;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    top: 100px;
    margin-left: -32px;
    background: #2e2e2e;
    z-index: 1
}
.eye::before{
    content: '';
    display: block; /* 伪元素默认是内联元素 */
    border: 3px solid black;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #ffffff;
    position: relative;
    left: 5px;
    top: -2px;
}
.eye.left{
    transform: translateX(-120px);
}
.eye.right{
    transform: translateX(120px);
}
.mouth{
    width: 200px;
    height: 200px;
    position: absolute;
    left: 50%;
    margin-left: -100px;
    top: 170px;
    
}
.mouth .up .lip{
border: 3px solid black;
border-top-color: transparent;
width: 100px;
height: 30px;
top: -15px;
position: absolute;
left: 50%;
margin-left: -50px;
z-index: 1;
background: #ffe600;
}
.mouth .up .lip.left{
    border-radius: 0 0 0 50px;
    transform: rotate(-15deg) translateX(-53px);
}
.mouth .up .lip::before{
    content: '';
    display: block;
    width: 6px;
    height: 30px;
    position: absolute;
    background: #ffe600;
    bottom: 0px;
}
.mouth .up .lip.left::before{
    right: -4px;
}
.mouth .up .lip.right{
    border-radius: 0 0 50px 0;
    transform: rotate(15deg) translateX(53px);
}
.mouth .up .lip.right::before{
    left: -4px;
}
.mouth .down{
    height: 160px;
    position: absolute;
    width: 100%;
    overflow: hidden;
    top: 7px;
}
.mouth .down .yuan1{
    border: 3px solid black;
    width: 150px;
    height: 1000px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 75px/300px;
    bottom: 0px;
    background:#9b000a ;
    overflow: hidden;
}
.mouth .down .yuan1 .yuan2{
    width: 150px;
    height: 120px;
    position: absolute;
    bottom: 0px;
    left: 50%;
    margin-left: -75px;
    border-radius: 75px 75px 0 0;
    background: #ff485f;
}
.face{
    border:3px solid black;
    width: 88px;
    height: 88px;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    margin-left: -44px;
    top: 210px;
    background: #ff0000;
}
.face.left{
    transform: translateX(-160px);

}
.face.left > img{
    transform: rotateY(180deg) translateX(-85px);
    transform-origin: 0 0;

}
.face.right{
    transform: translateX(160px);
    
}


